Current lead structure for superconducting magnet

Abstract

The invention discloses a current lead structure for a superconducting magnet, relates to a current lead structure, and provides a current lead structure for a superconducting magnet, wherein electric power can through the current lead structure, and a coolant can also pass through the current lead structure. The current lead structure for the superconducting magnet comprises a moving part and a fixed part which are axially butted, wherein the fixed part comprises a first fixed electrode and a second fixed electrode which are mutually insulated and arranged in an embedding way, a space inside the second fixed electrode is a coolant receiving channel; the moving part comprises a first moving electrode and a second moving electrode which are mutually insulated and embedded and arranged, a space inside the second moving electrode is a coolant guiding channel; and the end part of the first moving electrode and the end part of the first fixed electrode are conducted through contact, the end part of the second moving electrode and the end part of the second fixed electrode are conducted through contact and sealed, and the coolant guiding channel is communicated with a coolant receiving channel. Magnetizing and bleeding a superconducting coil by connecting a power supply and adding or reducing a coolant in a low temperature closed container holding the superconducting coil can be realized through the current lead structure.

Description

technical field [0001] The invention relates to a current lead structure, in particular to a current lead structure used to energize a superconducting magnet. Background technique [0002] At present, the application of high-field superconducting MR magnets in the domestic medical imaging industry is very common. The basic principle is to use the superconducting properties of some alloy materials at ultra-low temperature (usually liquid helium temperature), and place the coil wound with this type of wire in a closed container, through cooling, vacuum insulation and other The thermal insulation method creates a relatively stable low-temperature environment, so that the coils located in it can maintain a superconducting state. But in fact, the so-called cryogenic container is not strictly sealed. It needs to be filled with coolant (liquid nitrogen, liquid helium, etc.) The external circuit leaks energy, so it is necessary to leave a coolant channel and a positive and negativ...

AI Technical Summary

Problems solved by technology

The current general application is to separate the coolant channel from the current channel, and even the positive and negative current channels. This not only requires multiple jacks on the console, but also increases heat leakage, which is not conducive to maintaining low temperature and lowering the container. The evaporation rate of the coolant is medium, and the operation is relatively cumbersome: after the coolant is filled, the catheter needs to be taken out, and then the positive and negative current guide rods are inserted into the magnetization operation, and the positive and negative current guide rods are pulled out after the end ; If it is necessary to release energy or extract coolant, the above operations must be repeated, and the efficiency is not high

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